99色精品-9色在线-99色在线-99色视频 国产欧美日产一区二区三区_亚洲精品亚洲人成在线观看_四虎在线精品永久观看_免费一级a一片久久精

單項選擇題

During the PSC inspection, under the provisions of SOLAS 74, which one may not be regarded as clear grounds for ships’ detainment?()

A.failure of the proper operation of the main steering gear
B.failure of the proper operation of electrical installations
C.leakage of domestic water pump
D.insulation of exhaust pipes in engine room contaminated by oil

微信掃碼免費搜題